Take a look at some old posts with attached pictures or create one. and give some feedback. This is not an add-on but a new feature of 3.6 that I enabled.
Here is an example of a older thread with attachments like Steve is talking about. All of the attachments are the same size (larger thumbnail style) and you can click on attachment to see a larger image.
That one looks pretty good with he new add-on Steve. Let me go look at a few more before I give you additional feedback.